<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,minimum-scale=1,user-scalable=no">
    <title>4-3 Bootstrap中的栅格布局</title>
    <link rel="stylesheet" href="./bootstrap-3.3.7/dist/css/bootstrap.min.css">
    <script src="jquery/jquery-3.4.1.min.js"></script>
    <script src="bootstrap-3.3.7/dist/js/bootstrap.min.js"></script>


    <style>
    /**{*/
    /*    padding: 0;*/
    /*    margin: 0;*/
    /*}*/


    .test{

        height: 300px;
        background: #00b3ee;
    }

    /*@media screen and (max-width: 900px) and (min-width: 500px){*/
    /*    .test{*/
    /*        width: 100%;*/
    /*        height: 100px;*/
    /*        background: blue;*/
    /*    }*/
    /*}*/
    /*

    在屏幕多大时进行相应的操作
    @media screen and (min-width: *px)and(max-width: *px){

    }
    */

</style>
</head>
<body>

<div class="test col-lg-3 col-md-4 col-sm-6 col-xs-12 col-lg-offset-3 col-md-offset-4">

</div>
</body>
</html>
